Improvement in valve-gears



Z SheetsSheet1. G. A. C. BREMME.

VALVE GEAR.

No.181,242, Patented Aug. 22,1876.

FIGURE I.

INVENTOR.

N. PEI'ERS, FHOTO-LITHOGRAFHER, WASHINGTON. D, C.

G. A. C. .BREMME.

VALVE GEAR.

FIGURE 2 W'TNESSES. |NVENTOR: ZIIQJMZr/AM 2 sheets sheet 2.

P tenwed Aug.22,1876.

UNITED STATES PATENT OFFICE.

GUSTAV A. O. BREMME, OF LIVERPOOL, ENGLAND.

IMPROVEMENT m VALVE-GEARS;-

Specification forming part of Letters Patent No. 181,242, dated August22, 1876; application filed July 25, 1876.

To all whom it may concern:

Be it known. that I, GUSTAV ALBREGHT CARL BREMME, of Liverpool, in thecounty of Lancaster, in that part of the United King dom of GreatBritain and Ireland called England, have invented a new and useful1mprovement in Valve-Gear, which improvement is fully set forth in thefollowing specification, reference being had to the accompanyin'g twosheets of drawings, on which like letters and figures denotecorresponding parts.

Figure 1, Sheet 1, illustrates my improved valve gear or motion bydiagram. Fig. 2, Sheet 2, is a sectional elevation, showing my improvedvalve-gear or motion in detail.

This invention relates to a new gear or motion for working the slide andother descriptions of valves of steam and other motivepower engines andsteam-pumps, and is also particularly adapted for working steam-steeringgear and consists in actuating the valve spindle or rod by means of alever, which is attached at one end to the valve spindle by means of alink, and at the other end to the piston-rod of the engine by means of alink or stud. The lever is pivoted at a point near 7 its attachment tothe valve-spindle to a sliding rod or lever, which has a fixed travel,and is actuated by an eccentric. The arrangement is that the travel ofthe aforesaid sliding rod or lever opens the steam-port, whereby thepiston is set in motion, and the travel of the piston tends to close thesteam-port, and actually closes the steam-port when the aforesaid sliderod or lever ceases to move.

The action of the gear consists in changing the fulcrum of the lever,namely, that when the piston-rod is actuating the valve the fulcrum ofthe lever is between the valve-spindle and the piston-rod, and when thevalve is actuated by the eccentric, the point of attachment to thepiston-rod becomes the fulcrum of the lever.

Upon reference to Fig. 1, Sheet 1, and Fig. 2, Sheet 2, a represents thesteam-ports of a cylinder; at, the exhaust of same; I), slidevalve; 12slide-valve spindle. It may be presumed that the valve-spindle b worksbetween fixed guides on the dotted line, as indicated.-

b is the point of attachment for the lever b The lever b is attached atcto the rod 0 worked by the eccentric 'or crank 0 The lever is attachedat d to the piston-rod of the engine or the crank oi by means of aconnecting-rod. Assuming the crank or eccentrio 0 and the crank 01 areparallel, and remain parallel during the stroke, the valve b remainsstationaryon the center; but when the crank or eccentric c is in advanceof the crank d the proper motion is given to the valve, as will beunderstood by any person acquainted with the working of slide-valvesupon studying the diagram.

Having thus described the nature and construction of my invention, whatI desire to secure by Letters Patent is- In a valve gear, the lever bpivoted to and in combination with the-rod 0 which is held and worked bythe eccentric c, the point it of the lever being attached to and workedby the piston-rod or crank of the engine, the point (1 of the leverbeing attached to and working the slide-valve b of the engine,substantially as set forth.

In witness whereof I, the said GUSTAV AL- BREoHT CARL BREMME, havehereunto set my hand and seal this 26th day of May, in the year of ourLord one thousand eight hundred and seventy-five.

GUSTAV ALBRECHT CARL BREMME. [L. 8.]

Witnesses:

FREDERICK JOHN OHEESBROUG-H, JOHN HAMILTON REDMOND,

Both 'of 15 Water street, Liverpool,

England.

